RealTime Artistically Inspired Cloud Simulation and Rendering

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Real-Time Artistically Inspired Cloud Simulation
and Rendering

• Noah Brickman
• David Olsen
• Gillian Smith

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Problem

• Hard to render
• Important scene element
• Artistic control

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Solution

• Specify cloud shapes
• Artistically inspired
• Physically based
• Realtime rendering

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Related WorkSimple Non-Interactive Solutions

• Imposters, Skybox
• Pros
• Fast rendering
• Simple solution
• Cons
• Not interactive
• Limited control

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Related WorkArtistic Control

• Pros
• Artistic manipulation
• Cons
• Not physically based animation
• Non-interactive

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Related WorkCellular Automata

• Pros
• Physically based simulation
• Simplistic simulation system
• Interactive
• Cons
• Limited control

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Method Overview

• Specify 3D model
• Voxelize
• Cellular automata
• Rendering

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Voxelization
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Voxelization
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Cellular Automata

• Rules
• Growth
• Extinction
• Bounded voxel grid

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Rendering

• Point cloud
• Billboards
• Variable size
• Variable shading
• Evolving cloud structure

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Results
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Conclusions

• Direct artist control
• Cloudify 3D models
• Physically based simulation within bounding
  volumes